LCD Horizontal Timing Register.
| HSYNC_WIDTH | Horizontal Sync Width in CLCD Clocks from 1 to 256 HSync Width = HSYNCWIDTH+1 Clocks |
| HFP_WIDTH | Horizontal Front Porch size in lines from 1 to 256 |
| HSIZE_INDEX | Horizontal Front Porch Size in Pixels = (HSIZE + 1) *16 |
| HBP_WIDTH | Horizontal Back Porch size in CLCD Clocks from 1 to 256 -> HBP= (HBACKPORCH+1) |